Hydroxyamine hydrochloride → HCID 5353765, compound

Participants

Reaction Steps

To a suspension of hydroxylamine hydrochloride (0.27 g, 3.88 mmol) in tetrahydrofuran (5 ml) saturated NaHCO3 solution (3 ml) was added and the resultant mixture was stirred at ambient temperature for 10 min. To the reaction mixture a solution of crude 3-[3-(3-methoxy-phenylsulfamoyl)-phenyl]-acryloyl chloride (83a) (0.27 g, 0.68 mmol) in tetrahydrofuran (3.5 ml) was added and the mixture was stirred at ambient temperature for one hour. The reaction mixture was partitioned between ethyl acetate and 2N HCl. The organic layer was washed successively with water and saturated NaCl, then the solvent was removed. The residue was crystallised from acetonitrile and washed with diethyl ether affording the title compound as a white solid (0.1 g, 37%). M.p. 190-191.5° C. 1H NMR (DMSO-d6, HMDSO) δ: 6.29 (1H, d, J=16.0 Hz); 7.16 (2H, d, J=8.0 Hz); 7.24-7.78 (8H, m); 7.86 (4H, m); 8.94 (1H, br s); 10.57 (1H, s); 10.66 (1H, br s). HPLC analysis on Zorbax SB-C18 column: impurities 4% (column size 4.6×150 mm; mobile phase acetonitrile—0.1% H3PO4, gradient from 30 to 100%; sample concentration 0.2 mg/ml; flow rate 1.0 ml/ min; detector UV 254 nm). Anal. Calcd for C21H18N2O4S, %: C, 63.94; H, 4.60; N, 7.10. Found, %: C, C, 63.64; H, 4.45; N, 7.00.

Provenance & Evidence